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《Scientia Geographica Sinica》 2015-08
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Relationship Between Sunspots and Precipitation in Northwestern Liaoning in Recent 54 Years

CAO Yong-qiang;LIU Jia-jia;GAO Lu;School of Urban Planning and Environmental Science, Liaoning Normal University;  
The solar activity and the precipitation are important factors in the research of drought and flood.Study on the relationship between sunspot and precipitation is very important for the further study of regional drought and flood. Therefore this paper selects the typical characteristics of climate in northwest of Liaoning Province as the study area. This article calculates the 50 rainfall stations of daily precipitation data in1960-2013 in northwest of Liaoning Province and sunspot data during the same period. Combined with the precipitation anomaly and accumulative anomaly, calculation the sliding of an average values of 3 years, Get the analysis result of changes in precipitation conditions and trends; Using the Mann-Kendall test method to analyze the trend of precipitation in recent 54 years in the northwest region of Liaoning Province, and detecting the mutation years; The wavelet coefficient of precipitation and sunspots in northwest area of Liaoning Province were calculated based on the Morlet wavelet analysis method, and drawing the distribution of wavelet coefficients contour maps and the wavelet variance diagram. According to the changes in the time series of 54 years for different time segmentation, analysis on correlation between them, and detect the significant. The results show that, in recent 54 years precipitation showed a decreasing trend in fluctuation, the mutation occurred in 1996-1997 years. The trend of precipitation change after the abrupt change by rising to decreased, and the trend are relatively stable. Sunspot activity influence on the extreme years precipitation anomaly and showed a significant negative correlation. Compared with the sunspot extremism years, there is a lag of 5 years for precipitation changes, the annual precipitation in northwest of Liaoning Province of the main cycle is not too much influence. In different period of time, correlation between sunspot and precipitation showed a complex performance in northwest of Liaoning Province.
【Fund】: 国家自然科学基金项目(51279072)资助
【CateGory Index】: P461.1
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